Lever Operated Wafer Butterfly Valve

1.Product Overview

The lever operated wafer butterfly valve is a lightweight,compact throttling and shut-off valve widely used for fluid pipeline control.It features a wafer thin body design that clamps between two pipe flanges without extra flange ends,paired with a manual lever handle for direct on-site operation.

This valve relies on a circular disc rotating 90°inside the valve body to open,close or regulate flow.The elastic seat creates bubble-tight sealing,and the simple wafer structure saves installation space,material cost and construction time.Manual lever operation allows quick switch between fully open and fully closed status,ideal for medium and low-pressure general industrial and water supply pipelines.

2.Core Advantages&Features

Wafer Compact Structure

Ultra-thin valve body,clamped between two pipeline flanges with bolts only;no separate flange connections.Small occupation space,light weight,lower transportation and installation costs compared to flanged butterfly valves.

Manual Lever Direct Operation

Integrated multi-position lockable lever handle.Operators can rotate the disc from 0°to 90°freely,with positioning gears to lock the valve at any opening angle for flow regulation.No external actuators required for simple manual control.

Zero-Leak Elastic Soft Sealing

Valve seat made of EPDM,NBR or PTFE as options.The disc closely fits the elastic seat to achieve full tight shutoff,no leakage under rated working pressure,suitable for clean water,air and neutral liquid media.

Low Flow Resistance&Quick Switch

Thin disc design brings minor flow resistance;90-degree rotation completes full opening or closing within seconds,suitable for frequent switching working conditions.

Corrosion Resistant&Long Service Life

Valve body:Cast iron/ductile iron/stainless steel optional,epoxy coated for anti-rust

Disc:Cast iron with rubber coating or stainless steel SS304/SS316 for corrosive medium

Stem:Stainless steel,wear-resistant and anti-oxidation

Working temperature range:-20℃~120℃depending on seat material.

Easy Maintenance&Wide Customization

Modular structure for convenient disassembly,seat replacement without removing the whole valve from pipes.Available size DN40~DN1200,PN10/PN16 pressure grade;can upgrade to gear box,electric or pneumatic actuator upon request.

3.Main Technical Parameters

Nominal Sizes:DN40–DN1200(1.5"–48")

Nominal Pressure:PN10,PN16

Connection Type:Wafer type(clamped between flanges)

Operation Mode:Lockable manual lever handle

Rotation Angle:0°~90°adjustable

Shell Test Pressure:1.5 times nominal pressure

Seat Sealing Test Pressure:1.1 times nominal pressure

Optional Seat Materials:EPDM,NBR,PTFE,Viton

Valve Body Materials:Cast iron,ductile iron,SS304,SS316

Applicable Media:Tap water,sewage,air,weak acid&alkali liquid,industrial circulating water

Certification:ISO9001,CE,WRAS optional

4.Typical Application Scenarios

Water supply&drainage systems:Municipal waterworks,sewage treatment plants,building water pipelines

HVAC central air conditioning circulating water pipelines

Fire protection auxiliary water pipelines

Industrial production lines:Chemical light industry,food processing,power plant cooling water

Ventilation&air duct control for factory workshops

5.Working Principle

Turn the manual lever to drive the valve stem and the butterfly disc fixed on the stem.

Lever at 0°position:Disc perpendicular to pipeline,fully closed,fluid cut off completely

Lever rotated 90°:Disc parallel to pipeline,fully open,maximum flow rate

Any angle between 0°–90°can be locked to adjust flow volume for throttling control